Issue 1.06-812. Select an option to change the default Service Codes or to keep the defaultvalues.Why should the Service Codes be changed?One example is if the local Area Code matches a Service Code, such as 718(Night Mode Switching), then to prevent the users from accidentally dialing theService Code it can be changed to 718.13. Select the Key Assignment for use with trunks. “Line” keys are typically used forAnalog (C.O.) trunks or if there are fewer than 12 SIP trunks. “Loop” & “Park”keys are typically used for ISDN trunks and if there are more than 12 SIPtrunks.NOTE For most installations the Service Codes will remain default.Figure 6-12 Service Codes ScreenFigure 6-13 Key Assignment Screen